Transmission-gear mechanism.



C. E. FREDERICKSON.l TRANSMISSIN GEAR MEGHANISM. APPLIGATION FILED Nov. 7, 1911.

Patented Sept. 1912.

2 SHEETS-SHEET 1.

0. E. PREDERICKSON. .TRANSMISSION GEAR MEGHANISM.

APPLICATION FILED NOV. 7, 1911. w

Patented Sept. 17, 1912 dfimvr U N I'IED STATES.

PATENT OFFICE.

CLAYTON. E. FREDERICKSON, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE- HALF TO WILLIAM H. STENGER, F BERKELEY, CALIFORNIA.

TRANSMISSION-GEAR MECHANISM.

nosas-5e.`

Specification of Letterslatent.

Patented sept. 1v, `1912.

To all whom t may concern Be it known that I, CLAYTON E. FRED- My invention relates to certain new and useful improvements 1n power transmlttmg 'mechanisms which are/ more particularly adapted for use on motor vehicles and the like, and the invention primarily has for its object to provide an improved transmission mechanism of the friction drive or friction disk type inwhich the parts are so coperatively arranged and designed as to produce as high degree of eiliciency and safety in op? eration as possible.

In its generic nature, the invention embodies adriving shaft directly coupled with the power plant, which power plant may be either a two-cycle reversible gas engine, a four-cycle non-reversible gas englne or other prime gmover. The driving shaft has a bearing for the driven shaft, the two shafts being in alinement and the `driven* shaft car-ries a shiftable friction disk which .is driven through friction gears from the driving shaft, means being provided for releasing the friction gear connection between the driving and driven shafts during the time of gear shifting and when it 1s desired toobtain a direct drive between the two shafts; means are also provided' for locking the release mechanism duringy the time the direct drive connection is in operation.

My invention also embodies those novel details of construction, combination and arrangement of parts, all of which will be first fully described and then be vspecifically pointed out in the appended claims, reference being had to theaccompanying drawin s, in which:

igure 1, is-a top plan view of a part of the motor vehicle chassis embodyin' the invention. Fi 2, is la section on the ine 2 -2 of Fig. 1. ig. 3, is a section on the line. 3 3 of Fig. 1. Fig. 4, is' a section von the line Llr- Lt on Fi 1. Fig. 5, is anenlarged detail section o a part of the invention. v

Referring now to the accompanying in s, in which like letters and numralsfof re, erence indicate like parts in all of the the Chassis and 2 the cross brace beams.

3 designates a shaft-like bearing member that is rigidly mounted between the longitudinal beams l and which has anenlarged central bearing portion 4 to receive the bearing end 5 of the driving shaft 7 The driving shaft 7 is connected in the usual way with the prime mover or power plant 8, and it also has a bearing soolgtt 6 for the projectinlgbearing end'lO of he driven shaft 9. T e bearing 5 is provided with c lutch recesses 11 to receive clutchluvs 12 on the hub of the shifabie friction dik 1a The friction disk 13 has a projecting portion 14 grooved to receive the bifurcated endof the shifting arm 15 to 4which the shifting rod 17 is rigidly connected. The

" rod 17 is pivotedat 18 to the change speed pedal 19 that is pivotally mounted in. any suitable way in a posit-ion to be conveniently accessible bv the operator, a shaft 2O being shown in the .drawing on which the pedal 19 is rockably mounted.

21 is a frame member secured to the member' 3 and between which and the adjacent cross `vbrace 2 of the chassis, the friction gears 22 are mounted, the gears 22 being turned by engaging the friction gear 23 that is secured on the shaft 7 to turn with the same.

The ends of the member?) are rounded to form shaft portions and receive the friction gears 24 which are spring pressed outwardly to disengage the gears 22 lby springs 25 and which are held in engagement with the gears 22 by mechanism best shown in Fig. 1 of the drawings. This mechanism comprises a thrust bearing member 26 lthat engages the member 24 through the interpositlon of anti-friction'bearings 27 of any approved type, the thrust bea'ing member 26 havinga lever that is pivote at 28 'and has itsfree end engaged by a lug 31, o era-ting lever 29 that is mounted at one endJ 30cm the shaft porti n of the frame 3 and has its other end 3 threaded onto the screw rod 37, as shown. The rod 37 is mounted in bearings 34 projecting from the cross brace 2, adJacent to the rod, and itis revented from` having endwse mQYillnt ybollars 36a f The levers l29 are.

at its ends to prevent complete disengageigures, 1 designates the longitudinal beams i o nient between the rod 37 and the levers Q9.

The screw rod 37v is operated by' a release pedal 40 which is pivoted at 42 and 'connected by a connecting rod 39 with a lever 88 on the rod 37, the connecting rod 89 heing pivoted at 41 to the pedal 40. The rod 39 has a pin 43 that works in a slot 44 in the locking lever 45. The lever 45 is pivoted at 46 and has a locking heel 47 to coperate with the high speed lever 49, as will be here inafter more clearly explained. The high speed lever 49 is pivoted at 50 and has its end 48 secured by a connecting rod 51 -to the rod 17 that operates the shifting disk 13. The shaft 9 is provided with a squared portion 53 to cause the disk 13 to turn with it, and it is also provided with a retaining spring 16 for a purpose hereinafter made clear.

Then a two-cycle reversible engine is employed the foregoing parts are all that need to be used, but when a non-reversible engine is employed it is necessary to provide a reversing gearing on the shaft 9. Any t pe of reversing gearing may be employed; Bor purpose of illustration, l have shown the shaft 9 as made in two sections 9 and 62, the end of the shaft 9 carrying a gear 54 which is secured to the shaft 9 to turn therewith. The gear 54 has a clutch face 68 that may be socketed to receive the end of the shaft section 62, and the gear 54 meshes with an idler gear 55 that in turn meshes with a counter-shaft gear 63, on a countershaft 64 that has a pinion 65 to mesh with the loose gear 66 on the shaft 62. The gear 66 is held from movement along the shaft in any suitable way and it has a clutch face 67 to be engaged by the shiftable clutch member 56 which is keyed to the shaft section 62 and may be shifted into engagement withr either of t-he clutch faces 68 and 67, through the medium of the shifting lever 57 which is pivoted at 58 to a suitable support and is held to normally hold the clutch member 56 in engagement with the clutch face 68. The lever 57 may be operated by a foot pedal 61 on the rod orshaft 20 through the medium of connect-ing rod 69.

7While the reversing gearing may ormay not be used with a reversible engine it is unnecessary to use it with a reversible engineE and l prefer, when a reversible engine is used, to eliminate the reversing gearing, but where a non-reversible engine 1s einployed some type of reversing gearing must be used in order to obtain the practical re- Y the parts are in the position shown in Fig. 1.

Motion is imparted to the shaft 9 in the same direction as the shaft 7, through the medium of the friction gears 23-22-24-13. In order to change the speed, the operator presses forward on the release pedal 40 to turn the screw shaft BZand thereby separate thelevers Q9 and permit the springs to push the friction disk gears 24 away from one another and out of Contact with `the gears 22 and 13. He next presses the pedal 19 to move the disk 13 rearwardly toward the periphery of the disks 24 to increase the speed to the maximum indirect drive. He then disengages the pedal l40, whereupon the springs 33 restore the pe'dal`40 to its initial position, at the same time bringing the levers 29 closer together to press on the levers ofthe bearings 26 and thereby again bring the disks or gears 24 into engagement with the gears 22-13. rShould it be desired to have the directl drive connection or the highest speed, the operator presses the release pedal 40 forwardly to its maximum degree; This releases thedisk gears 24 from engagement with the gears 2:2 andthe shiftable gear disk 13 and at the same time moves the heel 47 to the posit-ion shown in Fig. 1 and out ofthe path of movement of the lower. end 48 vof the hand lever 49. He then grasps the lever 49 and pulls it` toward hiin to its maximum distance thereby causing the disk 13 to be pulled up closely to the member 8 and bring its projecting lugs 12 into the sockets 111 (see Fig. 5), which connects the shafts 7 and 9 directly so that they will rotate together. At this time also the projecting end 48, of the hand lever 49, will rest in the bend of the locking lever 45 so that the heel 47 will bear against the side of the projecting end 48V and prevent the release pedal 40 from moving upwardly to its initial position when disengaged by the foot of the operator and thus the gear disks 24 will vbe locked out of engagement with the gears Q2 and 13 during the time the shafts 7 and D are in direct connection. To move out of the direct drive position, the operator need lonly press the foot pedal 1S) or move the lever 49 forwardly whereupon the lower end 48 of the lever 49 will leave the heel 47 and release the pedal 40 to permit the springs 33 to act and again bring the gears 22, Q4 and 13 into engagement. Vhen it is desired to reverse the movement of the car the operator presses on the pedal 61 and thus shifts the clutch member 56 out of engagement with the clutch face 68 and into lengagement with the clutch face A67, thus vconnection beingV made between the shafts will be readily apparent to those skilled inf the art, Land yIl desire it understood that changes (,ii the details of construction, combination y[mdarmirgement of parts may be made without departing from the invention E train of normally engaged friction gears for or the se; p e ofthe appended claims.

What claim is:

1. In a -power transnittinv mechanism, a'

en s aft, la train of; -friction gears connecting said shafts and including a shiftable gearv disk mounted on; the driven shaft, 'a disk member meshing driving shaft and a dri with said shiftable disk, means continuously tending to movel said last named disk mem-i ber out of engagement with said shiftable disk, other means continuously tending to -nppose the action of said first mentionedv disk moving means, and means for positively overcoming the action of said last named continuously tendlng means to er- -mit first mentioned continuously ten ing -means to act'. [2. In a power transmittingmechanism, a driving shaft anda driven shaft, friction -gears connecting said shafts and including va pair -of laterally movable gear disks mounted independently of said shafts, a

fixed driving disk on the driving shaft, means for lmparting motion from said xed driving disk to said independently Vmounted, disks, a shiftable disk on said driven shaft/to engage said independently 4mounted disks, pedal actuated means for operatively disconnecting and connecting said independently mounted disks from said ".shiftable driven shaft disk, and another pedal actua-ted means for shifting said shiftable driven shaft disk. l

3.' In a power transmission mechanism, a? driven shaft and a driving shaft, a trans.

verse frame member, a pair of friction disks mounted on said frame member and movable tow rd and lfrom the' axial line of said sha ts, a shiftable disk' on said driven shaft,l

lmeas for` 'shifting said driven shaft disk falen' said driven shaft, means continuously ,tendln'g to hold said transverse frame vmem- Ato l means for controlling .the movement'of said f "ber vdisks in engagement with said driven shaft disk, means 'for transmitting the power of the driving shaft to said trans. verse frame member disks, means continuolfsly tendlng to release said transverse 1 4ber on said driving a train of normally engaged friction gears for transmitting the motion of said driving shaft to said disk, means including a screw and lever device coperative with certain of th'e gears of said train for operatively disconnecting said train of gears from said disk, and other means for shifting said disk to change speed.

5. In a power transmitting mechanism, a

driving shaft and a driven shaft, a shiftable friction disk mounted on said driven shaft, a

transmitting the motion of said driving shaft to said disk, means including a screw operated device for operatively disconnecting said .train of gears from said disk, other means for shifting said disk to change speed, and

.a train of friction gears for transmitting vthe motion `of said driving shaft to said disk, means for operatively disconnecting said train of gears from said disk, Vother means for shifting said vdisk to change speed, said disk having a clutch face, a memshaft for coperating with said clutch face when said clutch face is brought into engagement therewith to lock said driving and driven shafts directly together and av latch device on said driven shaft to engage said shiftable disk and retain it with its clutch face in lengagement with said driving shaft member.

7. In a power transmitting mechanism, a driving shaft anda driven shaft, a shiftable friction disk mounted on said driven shaft, a train of friction gears for transmitting the motion of said driving shaft to said disk, means for operatively disconnecting' said train of ears from said disk, other means for shiftlng said disk to change speed, means for operatively reconnecting said train of gears with said disk when said disconnecting means is released, said disk having a clutch face, a member on sald driving shaft for coperating with said clutch face when said lclutch face is brought into enga ement therewith to lock said driving an driven shafts directgtogether and a latch device on said driexi-ieshaift to engage said shiftable disk and retain it with its clutch face in engagement with said driving shaft member. Y

8. In a power transmitting nechanism, a driving shaft and a driven shaft, a shiftable friction disk mounted on saidf'fdrivenshaft, a train of friction gears for ans'mitting the motion of said driving sh f/to said disk means-'for operatively fonnecting said train of gears from said y gek, other means for shifting said disk to change speed, said disk having a clutch face, a member on said driving shaft for coperating with said` clutch face when said clutch face 1s brought Vfriction disk mounted on said driven shaft,

a train of friction gears for transmitting the motion of said driving shaft to said disk, means for operatively disconnecting said train of gears from said disk, other means 'for shifting said disk to change speed, means for operatively reconnecting` said train of gears with said disk when said disconnecting means is released, said disk having a clutch face, a member on said driving shaft for cooperating with said clutch face when' said clutch face is brought into engagement therewith to lock said driving and driven shafts directly together, and means for locking said disconnecting' means in its disconnected position when said driving and driven shafts are directly connected.

l0. A driving shaft and a driven shaft, a shift-,able friction disk keyed on said driven shaft, a second friction disk inountedseparately from said shafts and directly engaging said driven shaft disk, friction gears for transmitting motion of said driving shaft to said second disk, and a. screw actuated means for holding said second disk in contact with said shiftable disk and said fric` first mentioned continuously tending means -and retain said second disk 1n engagement with said Shiftable disk, and a screw device for assisting each of said continuously acting means 1n the performance of its respec tive function, according as said screw device is turned in one direction or the other, and means for shifting said shiftable disk.

12. ln a power transmittingmeans, a driving shaft and a driven shaft, a shiftable friction disk on said driven shaft, a second shiftable friction disk mounted separately from said shaft, means continuously tending said shiftable disk, a 'screw device for as sisting each of said continuously actuating means in the performance of its respective function, according as said screw device is turned in one direction or the other, means for shifting said shift-able disk,- said shiftable disk having a clutch member and said driving shaft having a clutch member' to directly connect said shafts when said clutch members are in engagement, and means coiiperative with said screw device for locking said second disk out of engagement with said shift-able disk when said shafts are directly connected.

i3. [n a power transmitting means, a drivingl shaft and i driven shaft, friction gear connections between the two shafts and including ashiftabic= friction disk on the driven shaft, and a second disk to engage said shiftable disk, and means for disconnecting said second disk from said shiftable disk, nwans for shifting said shiftable disk, said shiftahle disk and said driving shaft each having a coperating clutch member to effeet adirect connection between the two shafts when said shiftable disk is in one position, and means von said driven shaft for retaining said shiftable'disk in lsaid one position.

14. In a power transmitting means, a driving shaft and a-'driven shaft,Y friction gear connections between the two shafts and including av shiftable friction disk on the driven shaft, and a second disk to engage said shiftable disk, means for disconnecting said second disk from said A'shiftable disk, means for shifting said shiftable disk, said shiftable disk and said driving shaft each having a cotiperating clutch member to effeet a directconnection betweenl the two shafts when said shiftable disk is in one position, means on said Ydriven shaft for retaining said shiftable disk in said one position, and other means coperative-v-with said second disk disconnecting means and with said driven shaft disk shifting means fonlockin said disconnecting means to hold lsaid secon disk disconnected when said shafts are di-l rectly connected.

CLAYTGN E.

l/Vitncsses:

LINooL'N SONNTAG, WVM. H. S'rnNonu.

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